Serafina Cuomo

An abacus (ἄβαξ, ἀβάκιον), a counting board, was the usual aid to reckoning in antiquity. The Greeks and Romans alike used a board with vertical columns, on which (working from right to left) units, ...
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An abacus (ἄβαξ, ἀβάκιον), a counting board, was the usual aid to reckoning in antiquity. The Greeks and Romans alike used a board with vertical columns, on which (working from right to left) units, tens, and hundreds; or (where money was in question) units of currency, for instance the Attic signs for ⅛ obol, ¼ obol, ½ obol, 1 obol, drachma and so on, could be inscribed. The Salamis abacus is an example of a type of flat, large counting board, made of stone, of which more than twenty have survived from antiquity (Figure 1).There are also significantly fewer examples of small, bronze abacus. (Figure 2).The extant flat, large counting boards have been found in the Greek-speaking part of the Mediterranean, whereas the small bronze abaci appear to originate in the Roman world, and are engraved with Roman numerals. There are different possible reconstructions of how calculations were carried out on the ancient Greek or Roman abacus, which would seem to indicate that different procedures were also in use in antiquity In general, with addition, the totals of the columns were carried to the left, as in ordinary 21st-century addition.Less

Alan H. Griffiths

Abaris, legendary devotee of *Apollo from the far north, a shamanistic missionary and saviour-figure like *Aristeas whom *Pindar (fr. 270 Snell–Maehler) associated with the time of *Croesus—perhaps ...
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Abaris, legendary devotee of *Apollo from the far north, a shamanistic missionary and saviour-figure like *Aristeas whom *Pindar (fr. 270 Snell–Maehler) associated with the time of *Croesus—perhaps in connection with the king's miraculous rescue from the pyre and translation to the *Hyperboreans. Herodotus, ending his discussion of the latter (4. 36), tantalizes by refusing to say more than that ‘he carried the arrow around the whole world while fasting’ (cf. the mission of *Triptolemus, and *Demeter's search for Persephone).Less

Jean K. Quam

Edith Abbott (1876–1957) was a social worker and educator. She was Dean of the School of Social Service Administration at the University of Chicago from 1924 to 1942 and she helped in ...
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Edith Abbott (1876–1957) was a social worker and educator. She was Dean of the School of Social Service Administration at the University of Chicago from 1924 to 1942 and she helped in drafting the Social Security Act of 1935.

Jean K. Quam

Grace Abbott (1878–1939) was a teacher who went on to become Director of the Immigrants Protective League of Chicago and Director of the U.S. Children's Bureau. In 1934 she became ...
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Grace Abbott (1878–1939) was a teacher who went on to become Director of the Immigrants Protective League of Chicago and Director of the U.S. Children's Bureau. In 1934 she became professor of public welfare at the University of Chicago.

This is an advance summary of a forthcoming article in the Oxford Research Encyclopedia of Communication. Please check back later for the full article.
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This is an advance summary of a forthcoming article in the Oxford Research Encyclopedia of Communication. Please check back later for the full article.

Children are and have been active media users for decades. Historically, the focus on children and media issues have centered on the concerns and consequences of media use, generally around violence. In the last 40 years, we have seen a shift to study children and media from a more holistic approach, to understand both the positive and negative relationships between children and media use. Further, the recognition of the very important developmental differences that exist between children of different ages and the use of grand developmental theories, including those by Piaget and Vygotsky, have supported the field’s understanding of the unique ways in which children use media and the effects it has on their lives. Three important constructs related to a more complete understanding of children’s media use are the ABCs (attention, behavior, and comprehension). The first construct, attention, focuses on the way in which children’s attention to screen media develops, how factors related to parents and children can direct or influence attention to media, and how media may distract attention. The second construct is the behavioral effect of media use, including the relationship between media use and aggressive behavior, but importantly, the positive effect of prosocial media on children’s behavior and moral development. Finally, the third construct is the important and dynamic relationship between media and comprehension and learning. Taken together, these constructs describe a wide range of experiences that occur within children’s media use.

James Maxwell Ross Cormack and Nicholas Geoffrey Lemprière Hammond

Abdera, a flourishing Greek city east of the Nestus river on the coast of *Thrace (Diod. Sic. 13. 72. 2). It was traditionally founded as a colony of *Clazomenae in 654 bce, a date for which ...
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Abdera, a flourishing Greek city east of the Nestus river on the coast of *Thrace (Diod. Sic. 13. 72. 2). It was traditionally founded as a colony of *Clazomenae in 654 bce, a date for which 7th-cent. Greek pottery affords some support. It was reoccupied by colonists from *Teos (among them *Anacreon) in the second half of the 6th cent. (Hdt. 1. 168; Pind. Paean 2); its site was near Bulustra, a corruption of the name it bore in the Middle Ages, Polystylon. Like *Aenus, Abdera owed its wealth (it was the third richest city in the *Delian League, with a contribution of 15 talents) to its corn production (see the coins), and to the fact that it was a port for the trade of inland Thrace and especially of the Odrysian rulers. Abdera was a resting-place for the army of Xerxes in 480 bce when it was marching to invade Greece (Hdt.Less

Lou M. Beasley

Ralph David Abernathy (1926–1990) was a pastor who became president of the Southern Christian Leadership Conference after the assassination of Martin Luther King. He was director of ...
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Ralph David Abernathy (1926–1990) was a pastor who became president of the Southern Christian Leadership Conference after the assassination of Martin Luther King. He was director of personnel, dean of men, and professor of social studies at Alabama State University.

James B. Apple

The Abhisamayālaṃkāra (Ornament for clear realization) is an instructional treatise on the Prajñāpāramitā, or Perfect Wisdom, whose authorship is traditionally attributed to Maitreyanātha ...
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The Abhisamayālaṃkāra (Ornament for clear realization) is an instructional treatise on the Prajñāpāramitā, or Perfect Wisdom, whose authorship is traditionally attributed to Maitreyanātha (c. 350 ce). As a technical treatise, the Abhisamayālaṃkāra outlines within its 273 verses the instructions, practices, paths, and stages of realization to omniscient buddhahood mentioned in Prajñāpāramitā scriptures. In its abridged description, the Abhisamayālaṃkāra furnishes a detailed summary of the path that is regarded as bringing out the “concealed meaning” (sbas don, garbhyārtha) of Prajñāpāramitā. The Abhisamayālaṃkāra contains eight chapters of subject matter, with a summary of them as the ninth chapter. The eight subjects (padārtha) of the eight chapters (adhikāra) correspond to eight clear realizations (abhisamaya) that represent the knowledges, practices, and result of Prajñāpāramitā. The Abhisamayālaṃkāra’s eight clear realizations are types of knowledge and practices for bodhisattvas (“buddhas-in-training”) to achieve buddhahood set forth within the system of the five paths (lam lnga, *pañcamārga) common to Indian abhidharma and Yogācāra literature. The first three clear realizations are types of knowledge that comprise Perfect Wisdom. Total Omniscience, or the wisdom of all aspects (sarvākārajñatā, rnam pa thams cad mkhyen pa nyid), is regarded as the fundamental wisdom and the central concept of Prajñāpāramitā. Total Omniscience is direct, unmediated knowledge that exactly understands the manner of reality to its fullest possible extent in all its aspects. Path-omniscience (mārgajñatā, lam shes nyid) comprises the Buddhist path systems of śrāvakas, pratyekabuddhas, and bodhisattvas mastered by bodhisattvas. Empirical Omniscience (vastujñāna, gzhi shes) cognizes empirical objects in conditioned existence that are to be abandoned. It correlates to knowledge that is comprehended by śrāvakas and pratyekabuddhas. The path to buddhahood itself and the detailed means of its application are covered in the Abhisamayālaṃkāra by the fourth through seventh clear realizations. The fourth chapter is devoted to the realization of wisdom of all aspects (sarvākārābhisaṃbodha, rnam rdzogs sbyor ba), a yogic practice that enables a bodhisattva to gain a cognition of all the aspects of the three types of omniscience. The fifth realization is the summit of full understanding (mūrdhābhisamaya, rtse sbyor), whereby yogic practices reach the culmination of cognizing emptiness. The sixth chapter defines the gradual full understanding (anupūrvābhisamaya, mthar gyis sbyor ba) of the three forms of omniscience. The seventh abhisamaya clarifies the “instantaneous realization” (ekakṣaṇābhisamaya) that occurs at the final moment right before buddhahood. Abhisamayas four through seven are known as “the four methods of realization” of the three types of knowledge. The eighth realization, and last subject in the Abhisamayālaṃkāra, is the realization of the dharma body (dharmakāyābhisamaya). In this way, the first three realizations describe the cognitive attainments of buddhas, the middle four realizations discuss the methods that take the cognitive attainments as their object, and the eighth realization describes the qualities and attainments of the dharma body, the resultant body of buddhas. The treatise was extensively commented upon in Indian Buddhism and has been widely studied in Tibetan forms of Buddhism up to the present day.

D. Lynn Jackson

Until the 19th century, abortion law was nonexistent and abortion was not seen as a moral issue. However, by the turn of the 20th century, abortion was legally defined and controlled in ...
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Until the 19th century, abortion law was nonexistent and abortion was not seen as a moral issue. However, by the turn of the 20th century, abortion was legally defined and controlled in most states. The landmark Supreme Court case, Roe v. Wade (1973), marked the legalization of abortion but did not end the controversy that existed. Legislation at both the federal and state levels has added restrictions on abortion, making it difficult for women to exercise their reproductive rights. Social work's commitment to promote the human rights of women compels social workers to be aware of and involved in this issue.

Robert Sallares

Abortion was controversial in antiquity. Doctors taking the Hippocratic Oath (see hippocrates (2)) swore not to administer abortifacients, but other Hippocratic texts suggest that prostitutes (see ...
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Abortion was controversial in antiquity. Doctors taking the Hippocratic Oath (see hippocrates (2)) swore not to administer abortifacients, but other Hippocratic texts suggest that prostitutes (see prostitution, secular) often employed abortion. A *Lysias fragment suggests that abortion was a crime in Athens against the husband, if his wife was pregnant when he died, since his unborn child could have claimed the estate. Greek temple inscriptions show that abortion made a woman impure for 40 days (see pollution).The Stoics (see stoicism) believed that the foetus resembled a plant and only became an animal at birth when it started breathing. This attitude made abortion acceptable. Roman jurisprudence maintained that the foetus was not autonomous from the mother's body. There is no evidence for laws against abortion during the Roman republic. It was common during the early Roman empire (e.g. Ov. Am. 2. 14), and was practised for many reasons, e.g. for family limitation, in case of *adultery, or because of a desire to maintain physical beauty.Less